Bug 155036 - Very slow sheet scrolling in Calc on macOS
Summary: Very slow sheet scrolling in Calc on macOS
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Calc (show other bugs)
Version:
(earliest affected)
7.5.2.2 release
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: perf
Depends on:
Blocks: MacOS-Performance
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Reported: 2023-04-26 19:39 UTC by Dan Dascalescu
Modified: 2023-11-08 08:13 UTC (History)
3 users (show)

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Description Dan Dascalescu 2023-04-26 19:39:46 UTC 
I use the same 10,000-row file on two machines, a Linux box with mediocre specs, and a powerful MacBook Pro M1 Max with 32GB RAM. On the Mac, scrolling is much, much slower than on the Linux laptop.

A test case is in this related bug,
https://bugs.documentfoundation.org/attachment.cgi?id=185775&action=edit

Version: 7.5.2.2 (X86_64) / LibreOffice Community
Build ID: 53bb9681a964705cf672590721dbc85eb4d0c3a2
CPU threads: 10; OS: Mac OS X 13.3.1; UI render: default; VCL: osx
Locale: en-US (en_US.UTF-8); UI: en-US
Calc: threaded
Comment 1 Telesto 2023-04-26 20:50:05 UTC 
It's not really fast at zoom-level 65%. It's faster at zoom 160%. I have no linux comparison..

but there is lag between releasing fn + arrow up and the scrolling on screen.

Version: 7.6.0.0.alpha0+ (X86_64) / LibreOffice Community
Build ID: 066b23115c2a360507e306a88da572554daefab7
CPU threads: 8; OS: Mac OS X 12.6.3; UI render: Skia/Raster; VCL: osx
Locale: nl-NL (nl_NL.UTF-8); UI: en-US
Calc: threaded
Comment 2 ady 2023-04-27 04:57:36 UTC 
(In reply to Dan Dascalescu from comment #0)

> A test case is in this related bug,
bug 153985
Comment 3 Dan Dascalescu 2023-11-07 23:27:34 UTC 
Scrolling is also painfully slow if running LibreOffice as root, see https://bugs.documentfoundation.org/show_bug.cgi?id=153985#c15